|
| year | imports | change |
| 1980 | 239.63 | NA |
| 1981 | 192.47 | -19.68 % |
| 1982 | 183.89 | -4.46 % |
| 1983 | 178.02 | -3.19 % |
| 1984 | 167.55 | -5.88 % |
| 1985 | 1,067.85 | 537.33 % |
| 1986 | 1,994.66 | 86.79 % |
| 1987 | 1,717.10 | -13.91 % |
| 1988 | 1,694.62 | -1.31 % |
| 1989 | 1,882.47 | 11.09 % |
| 1990 | 1,161.84 | -38.28 % |
| 1991 | 1,010.82 | -13.00 % |
| 1992 | 787.05 | -22.14 % |
| 1993 | 607.37 | -22.83 % |
| 1994 | 1,270.97 | 109.26 % |
| 1995 | 1,009.72 | -20.56 % |
| 1996 | 727.97 | -27.90 % |
| 1997 | 583.34 | -19.87 % |
| 1998 | 227.30 | -61.04 % |
| 1999 | 375.89 | 65.37 % |
| 2000 | 487.22 | 29.62 % |
| 2001 | 390.22 | -19.91 % |
| 2002 | 442.36 | 13.36 % |
| 2003 | 874.68 | 97.73 % |
| 2004 | 1,395.75 | 59.57 % |
| 2005 | 1,598.35 | 14.52 % |
| 2006 | 1,861.80 | 16.48 % |
| 2007 | 1,197.11 | -35.70 % |
| 2008 | 1,204.83 | 0.64 % |
| 2009 | 1,139.79 | -5.40 % |
| 2010 | 631.62 | -44.58 % |
| 2011 | 589.74 | -6.63 % |
|
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